{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x3742cbd52fe86ef2b9deaf574bd8b759ce09e805c404225daa9b890c16280bb0",
    "signature": "0x136a2288c6c95aa0c78c8604064dd07195d03a0d5d451a5f33838ca456f1458a4df1cc33ae7266c003f797a8f0a369a3bd91145e20a6f001ade403082259a82b1b",
    "signer": "0xd3cA7B55fFc21a012A4F3fa07C2C8D79aA70edDf",
    "userId": "669483561"
  }
}